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Finding the Fourth Proportional to 419.72, 578.26 and 326.14

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Solution

The fourth proportional to 419.72, 578.26 and 326.14 is: 449.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.72 : 578.26 = 326.14 : x
  2. Step 2: Convert to fraction form
    419.72/578.26 = 326.14/x
  3. Step 3: Cross multiply
    419.72x = 578.26 × 326.14
  4. Step 4: Simplify right side
    419.72x = 188,593.72
  5. Step 5: Solve for x
    x = 188,593.72/419.72
  6. Step 6: Final answer
    x = 449.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.